Sync with 6429f252
Sync with 6429f252

Synced with dart-lang/site-webdev master branch, commit 6429f252:
https://github.com/dart-lang/site-webdev/tree/6429f252774ed568977df6f52fcaab594e655b99/examples/ng/doc/structural-directives

googlearchive/structural-directives,angular-examples/structural-directives,angular-examples/structural-directives,googlearchive/structural-directives